Arrangement for removing the casing at the end of an electric cable



Feb. 16, 1965 R. MANKOVITZ 3,169,315

ARRANGEMENT FOR REMOVING THE CASING AT THE END OF AN ELECTRIC CABLE Filed July so, 1963 INVENTOR, Robber Mankow'rz A TTORNEYS United States Patent 3,163,315 ARRANGEMENT FGR REMGVENG THE CASING AT THE 91* AN ELE-CTRTC {IAELE Robert Manlrovitz, goderarmsvagen 4S, .lohanneshcv, Stockholm, Sweden Filed July 30, 1953, Ser. No. 298,624 Claims priority, application Sweden, @ct. 1, 1962, 16,532/62; Feb. 14, 1963, 1,614/63 2 Claims. (Cl. 33-91) The present invention relates to a device or tool for stripping the end of an electric cable. The device relates principally to the type which comprises two shanks linked together by a hinge pin and spring loaded towards the closed position, one end of each shank constituting a handle, and of the other ends, one is provided with a cutting member and the other with an abutrnent or support ing means for supporting the end of the electric cable during the stripping operation.

The device according to the invention is characterized principally in that the abutment or supporting means is formed with two chutes or depressions arranged substatially at right angles to each other for supporting and guiding the electric cable during the stripping operation; one of the chutes being parallel to the hinge pin and intended for guiding the cable for lateral cuts thereto and the other chute for longitudinal cuts thereto.

In an embodiment of the present invention, the chute parallel to the hinge pin can have a principally V-sh-aped cross section; the bisector of the sides thereof being curved as an arc of a circle while having the hinge pin as a center.

A further embodiment of the present invention comprises an arrangement for adjusting the efifective cutting depth of the cutter member; the cutting depth being adjustable to predetermined depths corresponding to definite cable dimensions, especially cable thicknesses.

A still further embodiment of the present invention comprises an alternative arrangement for adjusting the effective cutting depth of the cutter member.

The invention will be further described in the following connection with the attached drawings, of which FIG. 1 shows the device according to the invention seen from one side; FIG. 2 shows a top plan view; FIG. 3 shows a section taken along the lines III-Ill of FIG. 1; FIG. 4 is a perspective view of another embodiment of the present invention; FIG. 4a is a section taken along lines IV-IV of FIG. 4; FIG. 5 is a side View similar to FIG. 1 and showing still another embodiment of the present invention; FIG. 6 is a section taken along the lines VI-VI of FIG. 5; and FIG. 7 is a plan view of the cutter member.

The same elements throughout the various views contain the same reference characters.

Reference numeral 1 designates a member, which is provided at one end of a handle 2. At the other end of member 1 there is rigidly mounted thereon an abutment or supporting means 3. A hinge pin 4 is arranged between the handle 2 and the abutment 3 of member 1, which hinge pin can take the form of a screw. Pivotally mounted on hinge pin 4, there is another member 5' which also has a handle 6 which is disposed in the same direction as the handle 2. The other end of the member 5 constitutes a support '7 for a cutter member 31.

A spring 1 is disposed between member 1 and member 5 in order to normally bias the handles 2 and 6 away from each other. Of course it should be pointed out that the abutment 3 could be mounted on member 5 and cutter member 31 could be mounted on member 1 in a normal pliers manner, and spring 1' could also be used in the manner as heretofore mentioned, i.e. to normally bias the handles 2 and 5 away from each other.

The cutter member 3 comprises a rectangular steel plate with at least the side facing the hinge pin 4 formed as an edge. The steel plate is retained at the end of member 5 by means of a mounting plate 9 which is securely screwed to the support 7 by means of two screws 39. Other securing means other than screws 31 can be utilized. The abutment 3 is formed by two channels, chutes or depressions 11 and 12 crossing each other, of which one 11 is arranged at right angles to the hinge pin 4 and parallel to the cutter member 31, while the other chute 12 is directed at right angles to the cutter member 31 but parallel to the hinge pin 4.

The chutes 11 and 12 have a cross section which is principally V-shaped. The chute 12 has a generally \hshaped cross section whereby the bottom portion is slightly rounded, and the bisector of the sides of chute 12 is curved in such a manner that the curved bisector has the hinge pin 4 as its center. The reason for making the bottom portion of chute 12 slightly rounded is to enable the device to be rotated around an electrical cable when disposed therein. In the embodiments shown, the abutment 3 is formed as a pressed plate, for example from steel. It can however, be formed in many other ways, for example by molding or hammering.

In the foregoing embodiment, cutter member 31 is not readily adjustable, however, it can be by loosening screws 30 and moving cutter member 8 to the desirable position. In order that cutter member 8 be movable, it can have an elongated slot through which screws 3% passes.

In order to render cutter member 8 readily adjustable to vary depths, there is shown in FIGS. 4 and 4a a means to accomplish this. The device shown in FIGS. 4 and 4a is the same as that shown in FIGS. 13 with the exception of the mounting for the cutter member 8.

The support 7 is formed with a groove 27 into which two screws 10 are inserted and screwed into a block 7' situated below, which in itself forms a support for the cutter member 8. The block 7' is displaceable in the longltudinal direction of the groove 27 and can, with the assistance of the screws 10, be fixed in the desired displacement position, i.e. in a position suitably corresponding to the displacement position of the cutter member 8.

As is evident from FIG. 4, the cutter member 23 is covered over by a cam member 13 provided with indications, for example figures corresponding to a table of cable dimensions attached to the tool, for instance to the member 5. The cam member 13, which can have any form suitable for the purpose, is shown in the drawing as a regular hexagon. This hexagon is eccentrically mounted on a screw pin 14 disposed in block 7', on which a lock nut or the like 15 is disposed .and intended to lock it after adjustment i.e. turning of the cam member 13, in a posi tion pressed against block 7. A rim of holes 16 is arranged around the cam member 13. These holes correspond to the adjustments or indications on the front of the cam member 13 and are consequently equal in number to the indications. The cam member 13 is latched against turning by a latching pin 17 which is fixed in block 7' and projects into a desired hole in the cam member 13. On adjusting the cam member 13, the nut 15 is loosened so that the plate or cam member 13 can be displaced out of engagement with the pin 17, after which, pivoting of the cam member on screw pin 14 can take place, it then being replaced on pin 17 through another selected hole so that the suitable figure of the indications is nearest to the cutter member 8.

In the embodiment of FIGS. 4 and 4a, a suitable arrangement for fixing the cutter member 28 in an existing position can be utilized by providing the cutter member 2% with a centrally located hole for engaging the pin 14 and with an aperture for engaging the latch pin 1'7 so that turnin of the cutter member 8 is prevented.

Because of the eccentric mounting of the cam member 13, the cutting area of the cutter member 28 is thereby Patented Feb. 16, 1965 the corresponding step indication on the cam plate-13 and adjust the latter in the rightstep position. With the foregoing adjustable feature it can be ensured that the cutting depth is proper so that onlythe outer casing of the cableis cut and the wires situated inside the cabl .are left unaffected by the cutting member. 7 I

Turn now to FIGS. 5-7 which are directed to the alternative arrangement for adjusting the effective cutting depth of the cutter member 8. The device shown. in

FIGS. 5-7 is the same as that of FIGS. 1-3 with the excep tion of the. mounting for the cutter member 8. 1

.The other end of member 5 constitutes a support'for a block 19A attached to the support 7 by means of screws 19. According to the invention, the cuttermember 8 as shown in FIG. 7 is constructed as a round plate provided ,With three pointed projections 3A, 3B, 8C projecting from its circumference. Theseprojections areof diiferent sizes,

and each of the points extends from the circumference of plate 8 to a predetermined distance which can be adjusted to effect the desired cutting depth. The plate '3 ,is securely-attached by means of screws 18 which extend through holes 18 of plates to one end of a principally cylindrically shaped grip member 19, which-is provided with a shaft 29 and which extends through a central hole Zlarranged in the .plate 8 and which is rotatably mounted in a bore MB in the block lllA. Pin 33 secures the grip member 19 to the shaft 20. The grip Hand the plate 8 are kept pressed in the directionof the block illA by a spring 23 arranged in bore 16C, which spring abuts against'the inner end of bore 10C and against a washer'ZZ secured to the end of shaft 20. A latching pin 32. is attached to the block 16A. In the plate 8, there area number of holes 24A, 24B, 24C, corresponding to and The device operates in the following manner: The end of an electric cable C (see FIG. 4) is placed in the chute 12, after the handles 2 and 6 have been brought together. When the handles are released again, the cutter member 8 springs down towards the casing of the end of the cable disposed in the abutment 3. The Whole device is rotated thereafter one or two revolutions around the end of the cable, the casing being cut by means of'cutter member 8 and guided bythe sides of the groove 12. After this operaticn, theend of the cable is removed from the device and is then placed into the groove 11 with the point of the cutter member 8 at the previously made incision. By pulling the device outwards from the end of the cable, the previously out part of the cable casing is cut through, after whichit can easily be removed.

A special advantage of the arrangement according to the present invention is that inorder to remove the casing only one tool need be used. For this purpose it has previously been necessary'to use a tool for slotting the end of the cable along the cable and then using aknife or the like for cutting off the incised part.

The present invention thus fulfills a great need.

The invention is of course not limited to the embodiments shown and described but can be varied in several ways Within the spirit and scope of the following claims.

What is claimed is: I

l. A device for stripping the end from an electric cable comprising a first member and a second member, means pivotally connecting said members together, cutter means mounted on one of said members, means for adjusting the depth said cutter means will cut into said electric cable,

- said adjusting means including block means mounted on to be'piace'd against a cable in either of the chutes ll, 12. a

When any of the edge points 8A, $3, 8C is brought into the'opera-tive position, which occurs when the grip 19 is pulled against the effect of the spring 23, away from the block MA and turned untilits desired point 8A, 8B, 8C is facing the cable disposed in thechutes 11, 12, whereupon the hole 24A, 24B orZdC corresponding to the point in question is penetrated by the latching pin 32, theplate a: and the grip 19 being kept in the position to which they. have been moved by the latching pin 32. 7

By meansof the foregoing arrangement, a convenient arrangement is provided for determining the desired cut-' one of said members, shaft means mounted in said block means, gripping means rotatably mounted on said shaft neansysaid cutter means being mounted on said gripping means and including spaced cutting projections extending therefrom, each cutting projection having a different cutcable according to claim 1 wherein spring means engage said shaft means to maintain said cutter means and grip ping means in engagement with said block means.

References (Iited by the Examiner UNITED STATES PATENTS 562,097 6/96 Rieckel. 7 1,499,429 7/24 Wiedeke 3O104 2,089,528 4/37 Barycz, 2,676,399 4/54 Clearwater. Y

2,712,252 7/55 Landis 81-372 X FOREIGN PATENTS 966,3 67 3/57 Germany.

WILLIAM FELDMAN, Primary Examiner. 

1. A DEVICE FOR STRIPPING THE END FROM AN ELECTRIC CABLE COMPRISING A FIRST MEMBER AND A SECOND MEMBER, MEANS PIVOTALLY CONNECTING SAID MEMBERS TOGETHER, CUTTER MEANS MOUNTED ON ONE OF SAID MEMBERS, MEANS FOR ADJUSTING THE DEPTH SAID CUTTER MEANS WILL CUT INTO SAID ELECTRIC CABLE, SAID ADJUSTING MEANS INCLUDING BLOCK MEANS MOUNTED ON ONE OF SAID MEMBERS, SHAFT MEANS MOUNTED IN SAID BLOCK MEANS, GRIPPING MEANS ROTATABLY MOUNTED ON SAID SHAFT MEANS, SAID CUTTER MEANS BEING MOUNTED ON SAID GRIPPING MEANS AND INCLUDING SPACED CUTTING PROJECTIONS EXTENDING THEREFROM, EACH CUTTING PROJECTION HAVING A DIFFERENT CUTTING DEPTH, MEANS TO MAINTAIN SAID GRIPPING MEANS AND CUTTER MEANS AT ONE OF THE CUTTING PROJECTIONS, AND ABUTMENT MEANS MOUNTED ON THE OTHER OF SAID MEMBERS, SAID ABUTMENT MEANS INCLUDING CHUTE MEANS DISPOSED THEREIN TO RECEIVE THE ELECTRIC CABLE TO CUT SAME FIRST IN ONE DIRECTION AND THEN IN ANOTHER DIRECTION BY SAID CUTTER MEANS. 